Tire demounting stand



Jan. 12, 1960 c. J. LOMEN EI'AL TIRE DBMOUNTING STAND 5 Sheets-Sheet 1 Filed Aug. 13, 1958 INVENTORS, on J. Lumen Kennel G. C u'lernan Jan. 12, 1960 c. J, 1.0mm ETAL TIRE nsuoummc sum:

INVEN TORS,

Ear-Hun J.Luman yKBrmeLh 5. Coleman .meq Aug. 13, 1958 'Illlllll 'IIIIIIIZ Jan. 12, 1960 c. J. LOMEN ETAL 2,920,664

TIRE DEMOUN'IING STAND Filed Aug. 13, 1958 3 Sheets-Sheet 3 INVENTORS, Earlcun J. Lumen I BY Kenneth [3. Coleman W: i. JAM W! a. a I

TIRE DEMOUNTING STAND 'Carlton J. Lomen and Kenneth G. Coleman, Hes-long, Calif.

Application :August 13, 1958, Serial No. 754,90; 3 Claims. (Cl. 1 44 2ss (Granted under Title 35,115. Code 1952 sec. 266) The invention herein may be manufactured and used by or for the Government for governmental purposes Without the payment to us of any royalty thereon.

invention relates to a tire demounting device. More particularly the invention relates to an apparatus of the type in which a fluid actuated piston moves a lever havinga tool attached thereon to exert pressure to break the -tire casing from its rim and to a fluid operated means for elevating the tire and rim into a demounting position on the apparatus.

Pneumatic tire casings, particularly those of large size used of! trucks and other large vehicles frequently adhere with g'reat tenacity to the wheel rims on which they are" mounted and therefore requiregreat force to free the" casing from its rim in the demounting process.

Frior art apparatus heretofore used in the demounting of heavy tires from rims have been highly successful and ha'vebeen' instrumental in preventing serious accidents incurred by the operators who perform these tasks. -In addition to the tire demounting problem, the task of lifting the tire with its rim onto the apparatus for demounting and' also off after completion of the demounting operation has algio presented obvious difficulties. The present invention'is designed to accomplish the tasks of demounting and handling of large truck tires by asingle operator as opposed'to prior art devices which required the handling by more than one'operator.

It is therefore a primary object of. this invention to provide an apparatus enabling a single operator to accomplish all the handling required .to demount a large 45 truck tire from its corresponding rim, in a most etfectiv manner.

, It is another object to perform the aforesaid operation by fluid actuated means. I i It is a further object of this invention to provide a meansto quickly and economically remove a tire from a The above mentioned and further-objects and advan-' tages of the invention and the manner of attaining them will'bemore fullyexplained in the following description taken in conjunction with the accompanying drawing in whichz' Fig.1 illustrates in elevation a tire demo'unting device coilsrtuct'ed in accordance with the invention and depicting atire andrim assembly mounted thereon for demounting the spindle mount being indicated by broken lines in its'tilted'position, Fig. 2 is a sectional view takenialong lines 22 of 'Fi'g? 3 Fig.- 1;

Fig. 4 is a section taken along lines 4.4 of Fig. 1

'5 is a section taken along linesS-S of Fig. 2; "Fig. 6 is a section taken along lines 6-6 of Fig. 4, Fig.7 is a perspective view of the clamp body,

is a perspective view of one .of the clamps, and, I

is a sectional'view taken along lines 33 of Fig. 9 is a perspective view illustrating the under side of the spindle mount.

Referring to the drawings in which similar reference characters designate corresponding parts throughout the 5 several views, all sectional views being taken looking in: v n the direction of the small arrows at the ends of the section lines. v The tire demounter of the invention is indicated in its entirety by 1 and includes a frame comprising a base 2, a pair of parallel upright members 3 rigidly fixed to H base 2, and a bracket 4 rigidlyfixed to the rearward portion of base 2. A table Sis rigidly fixed at its rearward end to uprights 3 and is supported at its forward end 0l1' a pair of webs 6 rising from base 2.

The table 5 is spaced above the base 2 at a convenient height for an operator to perform the tire demounting' operation.

A spindle mount 7 is hingedly connected as at 8 to the forward portion of table 5 and is provided with downward- I downwardly depending ears 10 at it's forward end thereof.

:The spindle mount 7 is tilted by'a fluid operated mechariism such as for example any hydraulic fluid or air un' der pressure which consists of piston assembly 11 pivotally connected at its rearward end as at 12 to uprights 3 f, .and at its forward end as at 13 to ears 10.

" sembly is disposed under table 5 and between webs 6.

The piston assembly 11 is operated by valve 14 mounted on an upright 3 and is in communication with the piston, assembly 11 by hose 15. Air or any fluid under pres- 7 .sureis supplied to valve 14 from a suitable source, notshown. I s

A shock absorber may be seen at 16 for'easing the mount 7. n A spindle 18 is rigidly fixed on spindle mount 7 by bolts 19 for tilting therewith. A circular table 20 is mounted for free rotation on spindle 18 by an axial downwardly depending tubular collar 21 integral to its under a series of radially extending symmetrically spaced holes 2 3. Thefunctions of spindle 18, table 20 and holes 23 will be described later.

loop 26.

A cone hook generally indicated by 27, and defininga straight portion 28 and a hook portion 29 at its lower; end, is provided for detachable engagement with loop 26.-

wand-receives a cone washer 30 in slidable engagement thereon. Cone washer 30 is designed to engage the centr al opening 31 of a vehicle rim 32.

Clamping means for securement of cone washer 30 to rim 32 is provided and consists of a .clampbody insdicated generally by 33, and including a handle 34, a. tubular central portion 35 and a base portion 36. A plurality of clamp members 37, defining a ring portion having an opening 38 somewhat larger than the diameter 'of cone ho ok- 27 and an extension 39 encircles hook '27 with- 'jzgiri tubular; portion 35. A lever 40 is pivotally mounted.

inner end to on base 36 as at 41 and is connected at its clamp extensions 39 of members 37 by .bolt 42.

Patented Jan- 0.,

1y depending ears 9 at its rearward end and a pair of This asside thereof and bearings 22. Table 20 is provided with Openings 43 and 44 are provided in tubular portion 35 i for assembling the clamp members in the body 33. The 1 clamp members 37am placed in body 33 through hole 44;.

and theextensionsprotrude through hole 53 for connection to lever 40. A spring 61 is placed between clamp members 37 and the bottom. of tubular portion 35. The en ire.,.assembly maybe; slid on t the hook 27.

In order that the bottom bead of the tire maybe broken fromtherim ,at-thesame time that the uppen beadis; sepelated, asupportring 45 'is' provided and hasva rounded rim por ion 48. (See Fig. ,5.) This :riug i provided with bolts e tothe p iph ry ofzring tin-spa ed relation whereby they will be received in holes 2 3. of round. table 20. Rings of-varying diameters will be used corresponding tothesizeof the tire to be dem unted.

.Metms for-breaking the tire casing 461from'rim 32are proyided and consists of an. arm..49 whichiapivoted between .the upper-ends.of uprights}. Its rearward end is pivotally connected by,,a.-,c1evis,51 to ,a piston rod 52 of a second fluid cylinder and pistonassernbly 53. Assembly 53 is pivotally mountedatits lower end as at 54--to bracket. ,A suitabletool 55 is .attached in one ,of :a

series'of holes 55 in the forward portion of arm A9 by bolt 57-.

A second valve 58 for operating .the second assembly 53 is mountedon uprights 3 and is connectedfor operation, to the assembly 53 by hose, 59.

The operation .of the tiredemounter is best understood from viewing vFig. -1 wherein.thqpositioniofthe spindle mount is illustrated in broken lines in itsfiilted position and ready for a tire. and,rim.1assembly.to be mounted thereon for demounting. The .tire and .rirn assembly is rolled onto table stop 6,0 which .is;a piece of metal securedto the forward edge ofbase v2. Then the elements shown in vj Fig. 4 are .assembled and placed throughthe central opening '31 in rim, 32 and the hooked portion '29 of the cone hook is connected to the,loop 2 6 of spindle cap 24. The cone washer 30 is slid downward until it rests on the peripheraledge of opening .31. The clamp assembly is sliddown until it rests onconewasher 30 and the operatorpresses downward on handle 134 ,so that tire 46 will be held'firm against ring 45 on'table 20. The clamps 37 will resist any upward movement of cone washer 30 due to the inclined position of clamps 37 as seen in'Fig. 4 which is due to the clamps 37.1'iding on,the bottom edge of opening 4,3. tendsto force the clamps 37 upwardly at one end and causes them ,to frictionally engage the cone hack 2.8 ,andprevent them sliding upward, thussecuring the tire and rim assembly firml to; the round table 20.

The operator now opens the valve 14 to. cause spindle mount 7 and tabled20 torotate into demoun ing Position in which it rides on a supporting roller '62 on table 1 5. When table 20 is in demountingposition, the tool.;55 is ,bolted to a hole 56 in order that the tool will be in a selected position-to break the bead from tire 46. Valve 58- is now opened-and aportion of the tirebead will be broken away'from the tire. The valve 58 is closed and the arm rises up, permitting the operator to rotate the tire 46 to another position and" the operation repeated" until the entire casing is loose on the'rim. The bottom head will be broken from the rim bythe pressure exerted by the arm 4.9 and tool 55 and the-rounded rim of the supp rtring 45.

After the casing 46 is freeof the rim, valvedfiisclosed and the spindle mountwill tilt into its previous-position. The operator then grasps the handle 34 'and'lever 40 and squeezes until the clamps 37 are freed from the hook 27 and =the clamp assembly will 'slideupward whereby itis removed :and, the cone hook 27 is detached from-loop;26 and withdrawn and'thetireand'rim' is -then removed.

,From -the above detailed description of ;theinvention, it -'is believed that the construction, use, and operation thereof will-at once be-apparent, and whilethere is herein shown and described the'preferred embodimenhof the invention, it is nevertheless'to be--understoodthat minor changestmay-be madetherein-without departing-fromthe sl ifit-mnd acopeof the invention-as claimed;

ransom 1. In a device for breaking a tire casing from a rim, a work supporting structure comprising a base, a pair of parallel uprights rigidly secured to said base, a pair of upright webs rigidly secured to said base and disposed forwardly of said uprighiaafirst table rigidly fixed to said uprights at its rearward end and atits forward end upon said webs,--a spindlemount-pivotally connected to said table, a spindle rigidlygfixed.onv said spindletrnount, a fluid operated means for itilting vsaidspindle mount pivotally connected to said uprights and said spindle mount, a secondtablerotatably' mounted on saidspindle, a spindle Whatisclaimedis:

7 cap centrally fixedonsaidsecond table and in axial alignment with said spindle, said spindle cap defining an integral loop at its upper end thereof, a support ring having -a rounded rim detachably mounted in concentric relation with said spindle cap on said second table and adapted to -supp,ort a vehicle-tire thereon, means to secure aitire andrim assembly on said support ring on ,said ;table com prising a cone hook defining a straightportionand: a;hook P rtion, saidhook portion-adapted to engageqsaidgloop onsaid spindle .cap,- a,cone ,washer adapted to beslidably received;on said cone,hook and engage-the peripheral rim of "the central opening of a vehicletire rim,; means adaptedto-prevent said washer from axial movement in me .inaction onsa-i cone. ho mp i ing a lampbo y defining a handle portion, a tubular portion and abuse portion, a; series of springbiased clamp members having central openings of somewhat larger diameter thansaid cone hook and having extensions adapted to extend through an opening in said ;tubular portion and a ,lever pivotally mounted .oueaid base portion and connected 'tosaid'extensionson.said clamp mem rsand meansfor securing a the pressing tool mounted between said ,up

rights at-theiruppertends thereof, said last-namedmeans toapply pressure on said-tire assembly whereby said ,tool and ,said supportwring cooperate: to loosen. both beadsof said tire from said cas ng simultaneously.

,2. In a deviceforfreeing the beads of a tire from a rim including asupporting structure and, a. mechanism associatedwith said structure adapted toapply force to one side ofsaid ,tire casing whereby both beads of said casing are freed from said rim, the combinationof a means to elevate an assembled tire and into @PQSi-n tion for said force application comprising a spindle mount hingedly connected to said structure, a fluid operated mechanism pivotally connected at its rearward end to said structure and at itsforward end to said spindle mount,

said fluid mechanism adapted-to hold said spindle in a horizontal position or lower it to an inclined position,'a spindle centrally fixed on saidspindle mount, a worksupporting table rotatably mounted on said spindle, 'there beinga series of .symmetrically spaced radially disposed 10165 in .said .table, a the supporting ring having :a-

rounded rim, a. plurality of circumferentially spaced downwardly dependinggbolts..;adapted to be received in aidh le in :.s abl,. wh re y. sai ii g i mounte on t b in ncentric relati n withsaid' p earpindle c p t saidtahle c ncentri withsai pindle.

said spindle defining a loop at its upper edge, and a for. the ,securement :oi a tire and rim on ,said support onsaidttable comprising a shaft havinga hook portionat one ,end thereof for engagement .with. said loop, a oone washer slidably received on .said shaft, said washer adapted to engage the central opening of a ,rim,,a'clamp body v lid ly. ceivedon said shaft-a ov s i w sher, a series of clamp members slidable on said shaft and -;dis-

nose within aid .clamnbody and -.a lever piv tally mounted on said clamp body and connected to said clamp members.

3. slntatire slemounte iortreein a tir c s g from fasupporting structure fo sai m anisml n nrising abase,,afirst pair of uprights securedto said 1 889,213 second pair of uprights haY ng a heightsubstantiallyliees than said first pair of uprights, a table secured at'its rear- 5 ward end to said uprights and at its forward end on said second uprights, a bracket secured to said base and spaced rearwardly from said first uprights, a spindle mount hingedly mounted to the forward end of said spindle mount, a fluid operated means carried by said structure adapted to rotate said spindle mount, a spindle secured to said spindle mount, a disc rotatably mounted on said spindle, a spindle cap centrally secured to said disc and in axial alignment with said spindle, said disc being provided with a series of symmetrically spaced radially disposed holes, a supporting ring defining a rounded upper peripheral surface and being provided with a series of circumferentially spaced downwardly depending bolts adapted to be received in said holes in said disc for coaxial securement of said ring on said disc, a clamping assembly adapted for attachment to said spindle cap for the securement of a tire and rim assembly on said ring, and a means for securing a tire removing tool mounted between the upper ends of said first uprights, to apply pressure to one side of said tire and cooperate with said support ring to simultaneously separate both beads of said tire from said rim.

References Cited in the file of this patent UNITED STATES PATENTS 2,213,535 Seip Sept. 3, 1940 2,536,139 Ritter Jan. 2, 1951 2,595,258 Hildred May 6, 1952 2,609,038 Henderson Sept. 2, 1952 2,655,984 Lowrey Oct. 20, 1953 2,720,915 Lenoir Oct. 18, 1955 2,749,156 Curtis June 12, 1956 

